software-architecture-analysis

Use this skill to reverse-engineer an existing software system, map its architecture, data flow, privacy posture, coupling, quality characteristics, and feature surface, then produce an evidence-grounded clean-room design document, PRD, or migration plan under new constraints. Use for codebase archaeology, implicit contract extraction, architecture health assessment, or decomposition-readiness analysis. Do not use for greenfield architecture design, direct code review, bug hunting, security auditing, or implementation of API, data, platform, or migration changes; route those to the relevant neighboring skill.